As you already might have seen, we released a new version of Diafaan SMS Server today. The handling of GSM modems is changed in the new version so maybe installing the new version will resolve the problem.

If you still have problems with the Nokia 3110c I would like to know if there are any error messages in the Event Log of the GSM modem. After you enable the communication log you might be able to see if the modem returns any errors after a modem command. In version 1.5 you can enable logging in the Advanced tab of the Gateway Properties. In version 1.1 this option is available in the Options dialog box.

I connect my phone Nokia 310c Classic to Diaffan programm, and it work very good the first day ,and i send many SMS , but when I try to connect it the second day it can't Connect with the program Althogh when I test the connection between the Phone and the programm the test is SUCCESS